What kinda soap?? Because the hair still looks nice lol it could have been a moisturizing soap. But keep using the conditioner and another 6 months will reverse any damage you might have done.
I only recently started using conditioner. For about 30 years I only used shampoo.
Now I only use conditioner. So I would say if you want to grow it longer then you will need to keep it moisturized with a good conditioner.